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[INET]: Give outer DSCP directly to ip*_copy_dscp

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This patch changes the prototype of ipv4_copy_dscp and ipv6_copy_dscp so
that they directly take the outer DSCP rather than the outer IP header.
This will help us to unify the code for inter-family tunnels.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2007-11-13 21:40:13 -08:00 committed by David S. Miller
parent a2deb6d26f
commit 29bb43b4ec
4 changed files with 8 additions and 7 deletions
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8
include/net/inet_ecn.h
View File

@ -83,9 +83,9 @@ static inline void IP_ECN_clear(struct iphdr *iph)
iph->tos &= ~INET_ECN_MASK;
}
static inline void ipv4_copy_dscp(struct iphdr *outer, struct iphdr *inner)
static inline void ipv4_copy_dscp(unsigned int dscp, struct iphdr *inner)
{
u32 dscp = ipv4_get_dsfield(outer) & ~INET_ECN_MASK;
dscp &= ~INET_ECN_MASK;
ipv4_change_dsfield(inner, INET_ECN_MASK, dscp);
}
@ -104,9 +104,9 @@ static inline void IP6_ECN_clear(struct ipv6hdr *iph)
*(__be32*)iph &= ~htonl(INET_ECN_MASK << 20);
}
static inline void ipv6_copy_dscp(struct ipv6hdr *outer, struct ipv6hdr *inner)
static inline void ipv6_copy_dscp(unsigned int dscp, struct ipv6hdr *inner)
{
u32 dscp = ipv6_get_dsfield(outer) & ~INET_ECN_MASK;
dscp &= ~INET_ECN_MASK;
ipv6_change_dsfield(inner, INET_ECN_MASK, dscp);
}

2
net/ipv4/xfrm4_mode_tunnel.c
View File

@ -113,7 +113,7 @@ static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
iph = ip_hdr(skb);
if (iph->protocol == IPPROTO_IPIP) {
if (x->props.flags & XFRM_STATE_DECAP_DSCP)
ipv4_copy_dscp(iph, ipip_hdr(skb));
ipv4_copy_dscp(ipv4_get_dsfield(iph), ipip_hdr(skb));
if (!(x->props.flags & XFRM_STATE_NOECN))
ipip_ecn_decapsulate(skb);
}

2
net/ipv6/ip6_tunnel.c
View File

@ -635,7 +635,7 @@ static void ip6ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
struct sk_buff *skb)
{
if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
ipv6_copy_dscp(ipv6h, ipv6_hdr(skb));
ipv6_copy_dscp(ipv6_get_dsfield(ipv6h), ipv6_hdr(skb));
if (INET_ECN_is_ce(ipv6_get_dsfield(ipv6h)))
IP6_ECN_set_ce(ipv6_hdr(skb));

3
net/ipv6/xfrm6_mode_tunnel.c
View File

@ -95,7 +95,8 @@ static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
nh = skb_network_header(skb);
if (nh[IP6CB(skb)->nhoff] == IPPROTO_IPV6) {
if (x->props.flags & XFRM_STATE_DECAP_DSCP)
ipv6_copy_dscp(ipv6_hdr(skb), ipipv6_hdr(skb));
ipv6_copy_dscp(ipv6_get_dsfield(ipv6_hdr(skb)),
ipipv6_hdr(skb));
if (!(x->props.flags & XFRM_STATE_NOECN))
ipip6_ecn_decapsulate(skb);
} else {